The Effect of Mg2+ and Mn2+ on Over-Production of Interleukin-2 in Recombinant E.coli

Document Type : Research Note


1 Biotechnology Group, Chemical Engineering Department, Tarbiat Modares University, P.O. Box 14115-143 Tehran, I.R. IRAN

2 Genetic Department, Faculty of Science, Tarbiat Modares University, P.O. Box 14155-143 Tehran, I.R. IRAN


In order to increase the productivity of human interleukin-2 (IL-2) as a model protein in the recombinant E.coliBL21 (DE3), the effect of magnesium acetate and manganese acetate was studied based on full factorial design experiments magnesium acetate and manganese acetate and their interaction exhibited an increasing effect on IL-2 expression level upto 25.24%, 16.80% and 23.30%, respectively, in comparison to 10.76% for the standard M9 medium(as usual defined medium in high cell density culture). Magnesium acetate was the most effective salt.Other experiments were performed to investigate the effect of magnesium and acetate ions separately. Results revealed that M9 medium with 1.5 times of magnesium ion concentration resulted in the highest expression level.


Main Subjects

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